导读: 迁移数据库的文件到不同路径 1.选择迁移的数据文件: D:/ORACLE/ORADATA/SUN/TEST.ORA http://www.sosdb.com/jdul/dispbbs.asp?boardID=1ID=219page=3 create table name (name varchar2(10)) tablespace test; (1) No Archive Mode (A)迁移数据文件 1
导读:迁移数据库的文件到不同路径
<p><font>1.选择迁移的数据文件: <br>D:/ORACLE/ORADATA/SUN/TEST.ORA </font><br><br>http://www.sosdb.com/jdul/dispbbs.asp?boardID=1&ID=219&page=3 </p><br><p>create table name <br>(name varchar2(10)) <br>tablespace test; </p><br><p>(1) No Archive Mode </p><br><p>(A)迁移数据文件 <br>1.看表所在的表空间与数据文件: <br>select d.name , t.name <br>from <br>v$datafile d , v$tablespace t <br>where <br>d.ts#=t.ts#; </p><br><p>2.alter tablespace test offline; <br>move D:/ORACLE/ORADATA/SUN/TEST.ORA D:/oracle/move/TEST.ORA </p><br><p>3. <br>alter database rename file 'D:/ORACLE/ORADATA/SUN/TEST.ORA' to 'D:/oracle/move/TEST.ORA'; </p><br><p>4.alter tablespace test online; </p><br><p>5.迁移成功。 </p><br><p>(B)迁移redolog 文件 <br>1.查看Redolog 的文件的位置所在。 <br>select member from v$logfile; </p><br><p>2.选择要迁移的Redolog的位置, 查看Redolog 位置的状态. <br>select g.member, v.status from <br>v$log v , v$logfile g <br>where <br>v.GROUP#=g.GROUP#; </p><br><p>3.如果日志的状态为CURRENT, 切换日志. <br>alter system switch logfile; </p><br><p>4.移动日志文件的位置 <br>move D:/ORACLE/ORADATA/SUN/REDO03.LOG D:/oracle/move/REDO03.LOG </p><br><p>5.数据字典的更名 <br>alter database rename file 'D:/ORACLE/ORADATA/SUN/REDO03.LOG' to 'D:/oracle/move/REDO03.LOG'; </p><br><p>6.进行切换日志的测试. <br>alter system switch logfile; </p><br><p>7.测试成功. </p><br><p>(2) Archive log Model </p><br><p>SQL> startup mount <br>更改数据库为Archive log 模式 <br>SQL> alter database archivelog <br>SQL> archive log start <br>打开数据库 <br>SQL> alter database open </p><br><p>(C)迁移数据文件 <br>1.看表所在的表空间与数据文件: <br>select d.name , t.name <br>from <br>v$datafile d , v$tablespace t <br>where <br>d.ts#=t.ts#; </p><br><p>2.alter tablespace test offline; <br>move D:/ORACLE/ORADATA/SUN/TEST.ORA D:/oracle/move/TEST.ORA </p><br><p>3. <br>alter database rename file 'D:/ORACLE/ORADATA/SUN/TEST.ORA' to 'D:/oracle/move/TEST.ORA'; </p><br><p>4.恢复数据文件 <br>如果数据库文件的状态是 Recover 执行如下语句 (OFFLINE) 不执行 <br>rocover datafile 'D:/oracle/move/TEST.ORA'; </p><br><p>5.上线 <br>alter tablespace test online; </p><br><p>datafile级的为 <br>alter database datafile db1 offline; <br>move db1 db2 <br>alter database rename file db1 to db2 <br>rocover datafile db2; <br>alter database datafile db2 online; </p><br><p><br>(D)Relolog的迁移 <br>1.查看Redolog 的文件的位置所在。 <br>select member from v$logfile; </p><br><p>2.选择要迁移的Redolog的位置, 查看Redolog 位置的状态. <br>select g.member, v.status from <br>v$log v , v$logfile g <br>where <br>v.GROUP#=g.GROUP#; </p><br><p>3.如果日志的状态为CURRENT, 切换日志. <br>alter system switch logfile; </p><br><p>4.移动日志文件的位置 <br>move D:/ORACLE/ORADATA/SUN/REDO03.LOG D:/oracle/move/REDO03.LOG </p><br><p>5.数据字典的更名 <br>alter database rename file 'D:/ORACLE/ORADATA/SUN/REDO03.LOG' to 'D:/oracle/move/REDO03.LOG'; </p><br><p>6.进行切换日志的测试. <br>alter system switch logfile; </p><br><p>7.测试成功.</p><p> </p>

MySQLviewshavelimitations:1)Theydon'tsupportallSQLoperations,restrictingdatamanipulationthroughviewswithjoinsorsubqueries.2)Theycanimpactperformance,especiallywithcomplexqueriesorlargedatasets.3)Viewsdon'tstoredata,potentiallyleadingtooutdatedinforma

ProperusermanagementinMySQLiscrucialforenhancingsecurityandensuringefficientdatabaseoperation.1)UseCREATEUSERtoaddusers,specifyingconnectionsourcewith@'localhost'or@'%'.2)GrantspecificprivilegeswithGRANT,usingleastprivilegeprincipletominimizerisks.3)

MySQLdoesn'timposeahardlimitontriggers,butpracticalfactorsdeterminetheireffectiveuse:1)Serverconfigurationimpactstriggermanagement;2)Complextriggersincreasesystemload;3)Largertablesslowtriggerperformance;4)Highconcurrencycancausetriggercontention;5)M

Yes,it'ssafetostoreBLOBdatainMySQL,butconsiderthesefactors:1)StorageSpace:BLOBscanconsumesignificantspace,potentiallyincreasingcostsandslowingperformance.2)Performance:LargerrowsizesduetoBLOBsmayslowdownqueries.3)BackupandRecovery:Theseprocessescanbe

Adding MySQL users through the PHP web interface can use MySQLi extensions. The steps are as follows: 1. Connect to the MySQL database and use the MySQLi extension. 2. Create a user, use the CREATEUSER statement, and use the PASSWORD() function to encrypt the password. 3. Prevent SQL injection and use the mysqli_real_escape_string() function to process user input. 4. Assign permissions to new users and use the GRANT statement.

MySQL'sBLOBissuitableforstoringbinarydatawithinarelationaldatabase,whileNoSQLoptionslikeMongoDB,Redis,andCassandraofferflexible,scalablesolutionsforunstructureddata.BLOBissimplerbutcanslowdownperformancewithlargedata;NoSQLprovidesbetterscalabilityand

ToaddauserinMySQL,use:CREATEUSER'username'@'host'IDENTIFIEDBY'password';Here'showtodoitsecurely:1)Choosethehostcarefullytocontrolaccess.2)SetresourcelimitswithoptionslikeMAX_QUERIES_PER_HOUR.3)Usestrong,uniquepasswords.4)EnforceSSL/TLSconnectionswith

ToavoidcommonmistakeswithstringdatatypesinMySQL,understandstringtypenuances,choosetherighttype,andmanageencodingandcollationsettingseffectively.1)UseCHARforfixed-lengthstrings,VARCHARforvariable-length,andTEXT/BLOBforlargerdata.2)Setcorrectcharacters


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SublimeText3 Chinese version
Chinese version, very easy to use

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

Notepad++7.3.1
Easy-to-use and free code editor

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.
